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- 2022 2.5GT
As more and more questions start to pop up about the forthcoming diesel engined KF (2017 on) model, I thought you might like a look under the hood. With the cover on it looks very much like the 2.5G.
.....and on the inside, the box is the same conventional six speed auto but note the absence of the Sport Mode.
Lots of sound deadening but under there is a 16V twin cam with variable valve timing. The silver tube with the injector pipes is the common rail. It supplies very high pressure fuel to the four piezo injectors which are computer controlled and the pressure is so high that they atomise the fuel as it sprays into the cylinders.
This is the high pressure pump that generates 25-30,000 psi. That's not a typo.
Another filter for you to think about is the fuel filter that lives behind that truck battery. . It is electrically heated to stop the fuel waxing in winter but as about 80% of the high pressure fuel is returned to the tank, the whole system including the fuel in the tank gets quite hot. How often you change it depends very much on how good your diesel is. Many of these truck stops get water in the storage tank and if that gets pumped into your tank the filter will catch it. In that case, it can freeze or wax the diesel. I change mine every two years as a precaution. A common rail diesel will cause some bizarre problems so don't let it get to that.
You can just about see the larger turbo behind all the shields and the smaller one is underneath.
This lives down the front and is the EGR, (exhaust gas recirculation). Both it and the particulate filter are a source of trouble if the wrong engine oil or bad quality diesel are used.
.....and on the inside, the box is the same conventional six speed auto but note the absence of the Sport Mode.
Lots of sound deadening but under there is a 16V twin cam with variable valve timing. The silver tube with the injector pipes is the common rail. It supplies very high pressure fuel to the four piezo injectors which are computer controlled and the pressure is so high that they atomise the fuel as it sprays into the cylinders.
This is the high pressure pump that generates 25-30,000 psi. That's not a typo.
Another filter for you to think about is the fuel filter that lives behind that truck battery. . It is electrically heated to stop the fuel waxing in winter but as about 80% of the high pressure fuel is returned to the tank, the whole system including the fuel in the tank gets quite hot. How often you change it depends very much on how good your diesel is. Many of these truck stops get water in the storage tank and if that gets pumped into your tank the filter will catch it. In that case, it can freeze or wax the diesel. I change mine every two years as a precaution. A common rail diesel will cause some bizarre problems so don't let it get to that.
You can just about see the larger turbo behind all the shields and the smaller one is underneath.
This lives down the front and is the EGR, (exhaust gas recirculation). Both it and the particulate filter are a source of trouble if the wrong engine oil or bad quality diesel are used.
